Storyline:

The giant, man-eating Graboids are back and even deadlier than before,
terrorizing the inhabitants of a South African wildlife reserve as they
attack from below-and above.

Movie Reviews:

I really wanted to like
it, but it was an enterprise doomed to failure. Not only the graboids
have a complicated life cycle that involves a flying version that uses
igneous farts to propel themselves, but the movie is now located in
South Africa and filled with clichés of how Americans see the place.The
monsters were cool enough, but the tension was gone, as well as the
classic Tremors feel, where an isolated community gets together to
defeat unbeatable carnivore beasts. Instead we have big guns easily
killing big dumb animals. It's not a totally bad film for the Tremors
"series", but certainly it is a disgrace to the original film.Bottom line: watching it for the melancholy and the fun. Had neither.